Many natural streams, especially in hilly areas, feature riffle... Many natural streams, especially in hilly areas, feature
Question:
Many natural streams, especially in hilly areas, feature "riffle...
Many natural streams, especially in hilly areas, feature "riffle and pool" characteristics alternating sections of shallow, quick moving flow (riffles) and deeper, slower moving flow (pools). In one stream system, a pool has a rectangular cross-section with a flow depth of 2 m, a width of 5 m, and a slope of 0.4%. The pool is generally sluggish with weedy deep pools. The riffle section immediately downstream from this pool is also roughly rectangular and is clean and somewhat winding with shoals and stony sections, has a slope of 3.0%, and a flow width of 8 m. What is the flow depth in the riffle? [HintFor very wide, shallow flow (width 10 x depth), the value of the wetted perimeter approaches the flow width and the hydraulic radius approaches the flow depth (for example, a rectangular channel with a flow width of 50 m and a depth of 0.5 m would have a wetted perimeter of 51 m and a hydraulic radius of 0.49 m. You can assume the riffle has wide, shallow flow.]
Macroeconomics Principles Applications And Tools
ISBN: 9780134089034
7th Edition
Authors: Arthur O Sullivan, Steven M. Sheffrin, Stephen J. Perez